Plok made an installer that does work for the EE with the old PrC version.
With it I have been able to convert the main campaigns, workshop modules and even old modules.
Though in case of non-campaign modules for some reason I had to rename the modules, or the installer would crash. And the workshop stuff needed to be moved into the moduels folder and then back in addition to the renaming.
Maybe he can help you with the new version too.